Qt: Fix crash on invalid ROM loads
Qt: Fix crash on invalid ROM loads

Anty-Lemon/mgba,libretro/mgba,sergiobenrocha2/mgba,libretro/mgba,mgba-emu/mgba,iracigt/mgba,sergiobenrocha2/mgba,Anty-Lemon/mgba,fr500/mgba,libretro/mgba,sergiobenrocha2/mgba,mgba-emu/mgba,sergiobenrocha2/mgba,jeremyherbert/mgba,mgba-emu/mgba,fr500/mgba,Iniquitatis/mgba,iracigt/mgba,fr500/mgba,jeremyherbert/mgba,Touched/mgba,MerryMage/mgba,iracigt/mgba,Iniquitatis/mgba,fr500/mgba,libretro/mgba,mgba-emu/mgba,libretro/mgba,jeremyherbert/mgba,Iniquitatis/mgba,Anty-Lemon/mgba,MerryMage/mgba,jeremyherbert/mgba,Touched/mgba,MerryMage/mgba,iracigt/mgba,Iniquitatis/mgba,sergiobenrocha2/mgba,Touched/mgba,Anty-Lemon/mgba